1-(1-naphthylazo)-2-naphthol CAS 2653-64-7

Introduction：Basic information about 1-(1-naphthylazo)-2-naphthol CAS 2653-64-7, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.

1-(1-naphthylazo)-2-naphthol Basic information

• Product Name: 1-(1-naphthylazo)-2-naphthol
• Synonyms: 1-(1-naphthylazo)-2-naphthol;Red 2R;2-Naphthalenol, 1-(1-naphthalenylazo)-;Solvent red 4 (C.I. 12170);C.I. Solvent Red 4;C. I. Pigment Red 40;1-(1-Naphtylazo)-2-naphthol;1-(1-Naphtylazo)naphthalene-2-ol
• CAS: 2653-64-7
• MF: C20H14N2O
• MW: 298.34
• EINECS: 220-176-4
• Product Categories: Organics
• Mol File: 2653-64-7.mol

1-(1-naphthylazo)-2-naphthol Chemical Properties

• Melting point: 230 °C
• Boiling point: 530.2±33.0 °C(Predicted)
• density: 1.20±0.1 g/cm3(Predicted)
• pka: 12.03±0.50(Predicted)
• form: powder to crystal
• color: Orange to Brown to Dark purple
• CAS DataBase Reference: 2653-64-7
• EPA Substance Registry System: 2-Naphthalenol, 1-(1-naphthalenylazo)- (2653-64-7)

Safety Information

• TSCA: TSCA listed
• HS Code: 2927.00.5000

1-(1-naphthylazo)-2-naphthol Usage And Synthesis

Chemical Properties	Bright blue-red. Stable for 1 hour at 120°C. Average light resistance, poor solvent resistance.
Preparation	Naphthalen-1-amine diazotization and Naphthalen-2-ol coupling.
Properties and Applications	yellow red. From toluene in the crystallization product melting point 224 ℃. Soluble in hot ethanol and benzene in red. In concentrated sulfuric acid to red light blue, dilution to red light purple solution, and then have red brown precipitation. Dye ethanol solution to join concentrated hydrochloric acid is dark red; Join concentrated sodium hydroxide solution for bright red light brown. Mainly used in oil, fat and wax, soap coloring. Standard Light Fastness Heat-resistant(℃) water Sodium Carbonate(5%) Hydrochloric acid(5%) Melting point Stable ISO General 220 150≥ 220 Sublimation Insoluble No change No change